CN107968206B - Carbon material grid for lead-carbon battery and preparation method thereof - Google Patents
Carbon material grid for lead-carbon battery and preparation method thereof Download PDFInfo
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- CN107968206B CN107968206B CN201711131158.2A CN201711131158A CN107968206B CN 107968206 B CN107968206 B CN 107968206B CN 201711131158 A CN201711131158 A CN 201711131158A CN 107968206 B CN107968206 B CN 107968206B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/68—Selection of materials for use in lead-acid accumulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a carbon material grid for a lead-carbon battery, which consists of a carbon material and a binder. The carbon material comprises one or more of flight graphite, all-carbon aerogel, foam carbon, conductive graphite, carbon black and acetylene black. The grid of the invention is made of carbon material, thus effectively reducing the weight of the polar plate of the lead-carbon battery, improving the energy density of the battery and making the battery more suitable for large-current charging and discharging. The invention also discloses a preparation method of the carbon material grid for the lead-carbon battery, which comprises the steps of mixing, molding, drying, demolding and finishing. The grid of the invention can be used as a negative grid of the lead-carbon battery, can be used as a positive grid of the lead-carbon battery, and can be simultaneously used as a positive grid and a negative grid to be applied to the lead-carbon battery. The grid preparation method is easy to operate, can prepare grids with different sizes, thicknesses and shapes according to the design requirements of the battery, and can be widely applied to the production of the lead-carbon battery.
Description
Technical Field
The invention belongs to the field of materials related to chemical power supplies, and particularly relates to a carbon material grid for a lead-carbon battery and a preparation method of the carbon material grid.
Background
Due to the outstanding charge and discharge performance of the lead-carbon battery, the application of the lead-carbon battery in the fields of new energy storage and power is continuously expanded. The grid plays a role in bearing active substances and conducting current in the lead-carbon battery. The performance and weight of the lead alloy plate grid have great influence on the charge-discharge performance and specific energy of the storage battery, and the storage battery using the traditional lead alloy plate grid has the defects of poor corrosion resistance, low specific energy of the battery and poor high-current charge-discharge performance. The traditional grid usually adopts a lead alloy, an aluminum alloy or a mode of doping the alloy and a carbon material. For example, patent CN201520716661.4 discloses a negative plate grid of a lead-acid storage battery, which comprises a tab and a frame, wherein the frame is formed by welding aluminum alloy ribs and conductive carbon fiber felt, so as to improve the utilization rate of active materials and prolong the service life of the battery; patent CN201510380971.8 discloses a method for preparing a lead-carbon positive grid of a lead-acid storage battery, which comprises the steps of carbonizing wood chips to obtain activated carbon, ball-milling the activated carbon and PVDF to obtain carbon slurry, then preparing lead alloy, and respectively injecting the lead alloy and the carbon slurry into a mold to obtain the positive grid, so that the quality of the grid is reduced, and the cycle life of the battery is prolonged; CN201220521533.0 discloses a novel lead-carbon battery grid, the grid structure comprises a tab, a frame and ribs, the service life of the grid can be prolonged and the battery capacity can be improved under the condition of the same weight as that of a conventional grid; CN201220587183.8 discloses a carbon battery grid, which is a flat plate structure, the plate surface is provided with through holes, and the grid material is graphite, so as to reduce the amount and quality of lead used. The disclosed method shows that the prior novel grid mainly takes lead alloy or aluminum alloy as a main component, and adopts a mode of doping alloy material and carbon material, and the grid technology still adopts alloy material as a main component, so that the defects of low specific energy and poor large-current charge and discharge performance of the battery cannot be solved, and the novel grid can not be simultaneously applied to the production of positive and negative plates. The carbon grid prepared by adopting graphite has single material selection and undefined production preparation method, can not realize the effective processing of the grid, and is difficult to be applied to the lead-carbon battery.
Therefore, a new carbon material grid for a lead carbon battery and a method for preparing the same are needed to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a carbon material grid for a lead-carbon battery, aiming at the problems in the prior art.
The technical scheme is as follows: in order to solve the technical problem, the invention provides a carbon material grid for a lead-carbon battery, which adopts the following technical scheme:
a carbon material grid for a lead-carbon battery comprises the following components in percentage by weight: 95.0% -99.9% carbon material and 0.1% -5.0% binder.
Further, the carbon material is composed of one or more of flight graphite, all-carbon aerogel, carbon foam, conductive graphite, carbon black and acetylene black. By adopting the combination of the carbon materials, the weight of the carbon material grid can be greatly reduced, and the performance of the grid can be effectively ensured.
Furthermore, the carbon material comprises the following components in parts by weight: 3-45 parts of flight graphite, 4-25 parts of all-carbon aerogel, 25-80 parts of foam carbon, 1-4 parts of conductive graphite, 1-8.5 parts of carbon black and 0.5-1.5 parts of acetylene black. The carbon material adopts the combination of the components, so that the weight of the grid is reduced by 42-45% compared with the common alloy grid, and the performance of the grid can be effectively ensured.
Furthermore, the carbon material comprises the following components in parts by weight: 90 parts of flygraphite and 39.9 parts of all-carbon aerogel. The carbon material adopts the combination of the components, so that the weight of the grid is reduced by 40 percent compared with the common alloy grid, and the performance of the grid can be effectively ensured.
Further, the binder is polytetrafluoroethylene, carboxymethyl cellulose or neoprene.
Has the advantages that: the carbon material grid for the lead-carbon battery is made of the carbon material, so that the weight of a polar plate of the lead-carbon battery is effectively reduced, the energy density of the battery is improved, and the battery is more suitable for large-current charging and discharging.
The invention also discloses a preparation method of the carbon material grid for the lead-carbon battery, which comprises the following steps:
1) weighing the carbon material for the carbon material grid for a lead-carbon battery according to any one of claims 1 to 5;
2) putting the carbon material obtained in the step 1) into a container, stirring for 10-15 min at the speed of 120-200 r/min by using a stirring paddle, then adding an ethanol aqueous solution, continuously stirring for 10-15 min, finally adding a binder, and continuously stirring for 15-30 min to obtain a mixed material;
3) filling the mixture obtained in the step 2) into a grid mold at normal temperature;
4) drying the filled grid mould obtained in the step 3), wherein the drying temperature is 120-180 ℃, and the drying time is 10-24 hours until the grid is completely dried;
5) and taking out the dried grid from the grid die, and finishing the shape and size of the grid to obtain the carbon material grid for the lead-carbon battery.
Further, the ethanol aqueous solution is 70% ethanol aqueous solution.
Further, drying the filled grid mould obtained in the step 3) in a vacuum environment or under the protection of inert gas.
Further, the binder is polytetrafluoroethylene, carboxymethyl cellulose or neoprene.
Has the advantages that: the preparation method of the carbon material grid for the lead-carbon battery is easy to operate, can prepare grids with different sizes, thicknesses and shapes according to the design requirements of the battery, and can be widely applied to the production of the lead-carbon battery.
Drawings
Fig. 1 is a flow chart of a production process of a carbon material grid for a lead-carbon battery in the invention.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments.
Example 1
In accordance with battery process requirements and as shown in figure 1,
firstly, preparing a carbon material according to the proportion of 3.0% of flight graphite, 5.0% of all-carbon aerogel, 80.0% of carbon foam, 2.0% of conductive graphite, 4.0% of carbon black and 1.0% of acetylene black;
secondly, putting all carbon materials into a container, mixing the carbon materials for 10min at the speed of 120r/min by using a stirring paddle, adding a certain amount of 70% ethanol water solution, continuously stirring the mixture for 10min, and finally adding 5.0% of binder, and continuously stirring the mixture for 15min to obtain a viscous mixed material;
thirdly, uniformly filling the prepared mixed material into a grid die meeting the process requirements by using an extruder at normal temperature;
fourthly, drying the filled grid mold in a vacuum environment, wherein the drying temperature is 180 ℃, and the drying time is 10 hours until the grid is completely dried;
fifthly, taking the dried grid out of the mold in a mechanical demolding mode;
and sixthly, further reshaping the shape and the size of the grid according to the process requirements to obtain a finished product of the carbon material grid for the lead-carbon battery.
The obtained grid can be used as a negative grid of a lead-carbon battery.
Example 2
In accordance with battery process requirements and as shown in figure 1,
firstly, preparing a carbon material according to the proportion of 60.0% of flight graphite and 39.9% of all-carbon aerogel;
secondly, putting all carbon materials into a container, mixing for 15min at the speed of 200r/min by using a stirring paddle, adding a certain amount of 70% ethanol aqueous solution, continuously stirring for 15min, finally adding 0.1% binder, and continuously stirring for 30min to obtain a viscous mixed material;
thirdly, uniformly filling the prepared mixed material into a grid die meeting the process requirements in a manual mode at normal temperature;
fourthly, drying the filled grid mould under the protection of inert gas, wherein the drying temperature is 120 ℃, and the drying time is 24 hours until the grid is completely dried;
fifthly, taking the dried grid out of the mold in a manual demolding mode;
and sixthly, further reshaping the shape and the size of the grid according to the process requirements to obtain a finished product of the carbon material grid for the lead-carbon battery.
The obtained grid can be used as a positive grid of a lead-carbon battery.
Example 3
In accordance with battery process requirements and as shown in figure 1,
firstly, preparing a carbon material according to the proportion of 45.0% of flight graphite, 25.0% of all-carbon aerogel, 25.0% of carbon foam, 1.0% of conductive graphite, 1.0% of carbon black and 0.5% of acetylene black;
secondly, putting all carbon materials into a container, mixing for 12min at the speed of 150r/min by using a stirring paddle, adding a certain amount of 70% ethanol water solution, continuously stirring for 12min, finally adding 2.5% of a binder, and continuously stirring for 25min to obtain a viscous mixed material;
thirdly, uniformly filling the prepared mixed material into a grid die meeting the process requirements by using an extruder at normal temperature;
fourthly, drying the filled grid mold in a vacuum environment at the drying temperature of 160 ℃ for 16 hours until the grid is completely dried;
fifthly, taking the dried grid out of the mold in a manual demolding mode;
and sixthly, further reshaping the shape and the size of the grid according to the process requirements to obtain a finished product of the carbon material grid for the lead-carbon battery.
The obtained grid can be used as a positive grid and a negative grid of a lead-carbon battery.
Example 4
In accordance with battery process requirements and as shown in figure 1,
firstly, preparing a carbon material according to the proportion of 5.0% of flight graphite, 6.0% of all-carbon aerogel, 72.5% of carbon foam, 4.0% of conductive graphite, 8.5% of carbon black and 1.5% of acetylene black;
secondly, putting all carbon materials into a container, mixing the carbon materials for 10min at the speed of 120r/min by using a stirring paddle, adding a certain amount of 70% ethanol water solution, continuously stirring the mixture for 10min, and finally adding 5.0% of binder, and continuously stirring the mixture for 15min to obtain a viscous mixed material;
thirdly, uniformly filling the prepared mixed material into a grid die meeting the process requirements by using an extruder at normal temperature;
fourthly, drying the filled grid mold in a vacuum environment, wherein the drying temperature is 180 ℃, and the drying time is 10 hours until the grid is completely dried;
fifthly, taking the dried grid out of the mold in a mechanical demolding mode;
and sixthly, further reshaping the shape and the size of the grid according to the process requirements to obtain a finished product of the carbon material grid for the lead-carbon battery.
The obtained grid can be used as a negative grid of a lead-carbon battery.
Example 5
In accordance with battery process requirements and as shown in figure 1,
firstly, preparing a carbon material according to the proportion of 4.0% of flight graphite, 5.0% of all-carbon aerogel, 75.0% of carbon foam, 4.0% of conductive graphite, 8.0% of carbon black and 1.5% of acetylene black;
secondly, putting all carbon materials into a container, mixing the carbon materials for 10min at the speed of 120r/min by using a stirring paddle, adding a certain amount of 70% ethanol water solution, continuously stirring the mixture for 10min, and finally adding 5.0% of binder, and continuously stirring the mixture for 15min to obtain a viscous mixed material;
thirdly, uniformly filling the prepared mixed material into a grid die meeting the process requirements by using an extruder at normal temperature;
fourthly, drying the filled grid mold in a vacuum environment, wherein the drying temperature is 180 ℃, and the drying time is 10 hours until the grid is completely dried;
fifthly, taking the dried grid out of the mold in a mechanical demolding mode;
and sixthly, further reshaping the shape and the size of the grid according to the process requirements to obtain a finished product of the carbon material grid for the lead-carbon battery.
The obtained grid can be used as a negative grid of a lead-carbon battery.
The test results were as follows:
the carbon material grid for the lead-carbon battery is made of the carbon material, so that the weight of a polar plate of the lead-carbon battery is effectively reduced, the energy density of the battery is improved, and the battery is more suitable for large-current charging and discharging.
It is to be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
Claims (2)
1. A carbon material grid for a lead-carbon battery is characterized in that: the composition comprises the following components in percentage by weight: 95.0% -99.9% carbon material and 0.1% -5.0% binder; the carbon material comprises the following components in parts by weight: 45 parts of flight graphite, 25 parts of all-carbon aerogel, 25 parts of carbon foam, 1 part of conductive graphite, 1 part of carbon black and 0.5 part of acetylene black, wherein the binder is polytetrafluoroethylene, carboxymethyl cellulose or chloroprene rubber.
2. A preparation method of a carbon material grid for a lead-carbon battery is characterized by comprising the following steps: the method comprises the following steps:
1) weighing the carbon material for the carbon material grid for the lead-carbon battery according to claim 1;
2) putting the carbon material obtained in the step 1) into a container, stirring for 10-15 min at the speed of 120-200 r/min by using a stirring paddle, then adding an ethanol aqueous solution, continuously stirring for 10-15 min, finally adding a binder, and continuously stirring for 15-30 min to obtain a mixed material; the ethanol water solution is 70% ethanol water solution; the binder is polytetrafluoroethylene, carboxymethyl cellulose or chloroprene rubber;
3) filling the mixture obtained in the step 2) into a grid mold at normal temperature; placing the filled grid mold obtained in the step 3) in a vacuum environment or under the protection of inert gas for drying treatment;
4) drying the filled grid mould obtained in the step 3), wherein the drying temperature is 120-180 ℃, and the drying time is 10-24 hours until the grid is completely dried;
5) and taking out the dried grid from the grid die, and finishing the shape and size of the grid to obtain the carbon material grid for the lead-carbon battery.
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| CN111261840B (en) * | 2018-11-30 | 2021-02-26 | 中国科学院大连化学物理研究所 | Integrated lead-carbon battery carbon electrode and preparation and application thereof |
| CN110224141B (en) * | 2019-05-16 | 2022-01-04 | 旭派电源有限公司 | Preparation method of negative grid alloy of all-lead-carbon battery |
| CN110277560B (en) * | 2019-06-28 | 2020-10-23 | 清华大学深圳研究生院 | Current collector and preparation method thereof, electrode plate and preparation method thereof, and lead-acid battery |
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| CN1075031A (en) * | 1992-01-29 | 1993-08-04 | 北京航空航天大学 | Carbon-carbon composite electrode battery and manufacturing process thereof |
| CN1380710A (en) * | 2002-05-23 | 2002-11-20 | 乌日根 | Nano carbon tube composite high-energy accumualtor-separator gate |
| CN102544517A (en) * | 2010-12-23 | 2012-07-04 | 杨秀宇 | Lead-acid storage battery with cellular grid made of super carbon fiber |
| CN102969511A (en) * | 2012-11-29 | 2013-03-13 | 广州神力能源科技有限公司 | Carbon fiber composite board grid and preparation method thereof |
| CN202871906U (en) * | 2012-11-09 | 2013-04-10 | 莫之民 | Carbon battery grid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8399134B2 (en) * | 2007-11-20 | 2013-03-19 | Firefly Energy, Inc. | Lead acid battery including a two-layer carbon foam current collector |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075031A (en) * | 1992-01-29 | 1993-08-04 | 北京航空航天大学 | Carbon-carbon composite electrode battery and manufacturing process thereof |
| CN1380710A (en) * | 2002-05-23 | 2002-11-20 | 乌日根 | Nano carbon tube composite high-energy accumualtor-separator gate |
| CN102544517A (en) * | 2010-12-23 | 2012-07-04 | 杨秀宇 | Lead-acid storage battery with cellular grid made of super carbon fiber |
| CN202871906U (en) * | 2012-11-09 | 2013-04-10 | 莫之民 | Carbon battery grid |
| CN102969511A (en) * | 2012-11-29 | 2013-03-13 | 广州神力能源科技有限公司 | Carbon fiber composite board grid and preparation method thereof |
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